ANGRY X Factor judges Tulisa Contostavlos and Gary Barlow have barred their acts from mixing with Rylan Clark – saying his antics will shatter their credibility.

Tulisa read the riot act to singer Lucy Spraggan after she joined oddball Rylan, 23, for a night out this week and returned drunk.

The judge, 24, accused her of “not taking it seriously and throwing away her opportunity”.

An X Factor insider said: “Tulisa was disappointed with Lucy – she had her down as a serious musician and a real competitor for the title but now she thinks she’s just here for a laugh.

“They really embarrassed themselves. Photos of them rolling around drunk in the street appeared and it really brings the show into disrepute.”

Rival Gary, 41, gave his hopefuls a similar warning about Rylan, saying: “He shouldn’t be here. You’ll ruin your chances if you’re not careful.”

The source claims he told Kye Sones, 30, and Christopher Maloney, 34, to distance themselves from tuneless Rylan and his antics, blaming him for bringing a “bad attitude” to the camp. “Gary has made his feelings about Rylan quite clear,” the insider added.

“But he’s had another word with his own acts and warned them that there is no place for his messing around on the show.”